Calculate the concentration of fluoride ions in a saturated barium fluoride (K_sp = 1.7 * 10^-6) solution.

Question

Quizplus · Accepted Answer

The dissolution of barium fluoride (BaF2) in water can be represented as: BaF2 ⇌ Ba²⁺ + 2F⁻. The Ksp expression is Ksp = [Ba²⁺][F⁻]². Let [Ba²⁺] = x and [F⁻] = 2x. Then, Ksp = x(2x)² = 4x³. Solving 4x³ = 1.7 * 10⁻⁶ gives x ≈ 3.8 * 10⁻³ M, so [F⁻] = 2x ≈ 7.6 * 10⁻³ M.

Calculate the Concentration of Fluoride Ions in a Saturated Barium